Both DeerTV outdoor and indoor enclosures are designed to:A filter and a cooler for the ambient air;DeerTV projector enclosure can let you put projector in a bad environment; Protect projectors from damaging elements like dust, humidity, rain, snow, smoke, cold or heat;Get projector bulb work long time;Fan cool or with individual air conditioning to help protect your projector from overheating;To protect your investment, a quality finished projector enclosure solution comes with strong enough and metal frame, the security keylock system to prevent vandalism and theft of your projector investment.